20 Low Voltage Products & Systems
AC 1006.9 - 5/03 ABB Inc. • 888-385-1221 • www.abb-control.com
3:2 Functions
The PST softstarter has several integrated protection and warning functions.
Almost any type of fault can be detected and displayed.
All available protections, warnings and fault indications are listed below.
Start/Stop functions
• Start ramp
• Stop ramp (also called soft stop or decel)
• Initial voltage
• Step down voltage
• Current limit
• Kick Start
• Extended start range
• Extended stop range
• Sequence start
Protection functions
• Motor overload protection
• Locked rotor protection
• Motor underload protection
• High current protection
• Phase imbalance protection
• Phase reversal protection
• SCR overload protection
• PTC input for motor protection
Warning functions
• Warning high current
• Warning low current
• Warning motor overload
• Warning SCR overload
Chapter 3 - Description
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